I was reading the review right before mine...
...and I must say that that user did have a point. First off all, the reason why your game is like 5mb, is because you have your sound quality way to high. (its probably like at 160.) you should bring it down to about 96. Second, its kinda lame that its only one level. You can make the whole game if you wanted to under one file. Try going to tucows.com, download an mp3 or wav editor, so you can decrease the sound file size, and you'll notice the difference in the file size in the animation.